• Crystal-clear 4.3 inch high-definition display
• All-metal zinc alloy bronze craft cats eye for anti-pry protection
• 145-degree super wide angle camera for comprehensive surveillance
• PIR motion detection and human body induction for enhanced security
• Infrared night vision for reliable visibility in low-light conditions
• Customizable with 12 polyphonic music options and adjustable ringtone size
• Support for up to 32G TF card for convenient photo and video storage
• Suitable for door thickness 35-120mm and door hole diameter 14-50mm
• English/Chinese language options and operating temperature of -20-55 Degrees Celsius

Unbox the SF550 Digital Door Viewer and find everything you need for hassle-free installation, including indoor host, outdoor handset, USB charging cable, metal hanging plate, screw pack, and English operation guide.